This book on ruby synthesis shows Frémy's method for flux growth. This book also documents the first jewelry from the late 1800s containing synthetic rubies.--description submitted for Facets of GIA exhibit in 2009.
"...reporting and illustrating Fremy's celebrated synthesis of the ruby although the latter were uniformly small in size....a rare work."-- Gemology by J. Sinkankas, entry no. 2239.